就地生成气水分离膜气井控水数值模拟  

Numerical simulation of water control of gas wells with in-situ generated gas-water separation membrane

作　　者：贾虎[1] 周子力 张雨菲 黎棚武 JIA Hu;ZHOU Zili;ZHANG Yufei;LI Pengwu(State Key Laboratory of Oil and Gas Reservoir Geology and Development Engineering(Southwest Petroleum University)Chengdu 610500,China;Oil Production Technology Research Institute,Xinjiang Oilfield Company,PetroChina,Karamay 834000,China;Boda Exploration and Development Management Department,Tarim Oilfield Company,PetroChina,Korla 841000,China)

机构地区：[1]油气藏地质及开发工程全国重点实验室(西南石油大学),四川成都610500 [2]中国石油新疆油田分公司采油工艺研究院,新疆克拉玛依834000 [3]中国石油塔里木油田分公司博大采油气管理区,新疆库尔勒841000

出　　处：《断块油气田》2025年第2期300-307,共8页Fault-Block Oil & Gas Field

基　　金：四川省自然科学基金重点项目“基于机器学习分子设计的分离膜增稠CO_(2)无水控水压裂液体系构筑”(2025ZNSFSC0029);国家自然科学基金原创探索计划项目“低渗透储层就地生成气水分离膜屏障实现天然气井选择性堵水研究”(52250001)。

摘　　要：针对气井产水问题,文中提出了就地生成气水分离膜控水方法。基于气水分离膜形成过程与作用原理,建立了考虑气水分离膜蒸发与析出过程的生成模型和考虑气水分离膜在不同渗透率下拟残余阻力系数的堵水模型。基于不同尺度网格模型验证了该方法不受网格尺度的影响,并分析了岩心尺度下非均质性对膜分布的影响:非均质性较弱时,膜分布较均匀;非均质性较强时,膜分布受孔隙大小影响,孔隙越小的网格膜浓度越高。以典型裂缝性底水产水气藏为例,分析了气水分离膜对控水效果的影响。结果表明:堵水时机越晚,底水连通性越好,裂缝渗透率越高,储层越薄,水淹程度越高,气水分离膜浓度就越高,堵水效果越好;对采出程度的影响从大到小依次为气层厚度、裂缝渗透率、底水连通性、堵水时机。研究成果可为气水分离膜控水先导性试验提供借鉴和参考。Aiming at the problem of water production of gas wells,a water control method of gas-water separation membrane generated in-situ is proposed.Based on the formation process and function principle of the gas-water separation membrane,the generation model considering the evaporation and precipitation process of the gas-water separation membrane and the water plugging model considering the pseudo residual resistance coefficient of the gas-water separation membrane under different permeability are established.Based on grid models of different scales,it is verified that the method is not affected by grid scale,and the influence of heterogeneity on membrane distribution at core scale is analyzed:when the heterogeneity is weak,the membrane distribution is more uniform;when the heterogeneity is strong,the membrane distribution is affected by the pore size,and the grid membrane concentration is higher with smaller pores.Taking typical fractured bottom water gas reservoirs as an example,the effect of gas-water separation membrane on water control is analyzed.The results show that the later the water plugging timing,the better the bottom water connectivity,the higher the fracture permeability,the thinner the reservoir,the higher the degree of water flooding,the higher the concentration of gas-water separation membranes and the better the effect of water plugging.The order of influence on the recovery degree from big to small is the thickness of gas layer,fracture permeability,bottom water connectivity and water plugging time.The research results can provide guidance and reference for pilot experiments on water control of gas-water separation membrane.

关 键 词：气水分离膜 气井控水 底水气藏 数值模拟 

分 类 号：TE371[石油与天然气工程—油气田开发工程]